Selective signaling system.



1. A. HUUT:

SELECTIVE susnuuc isvsfan. APPLICATION FILED IAI. I. "I2- Patented Apr. 3,1917.

.HULIT. SELECTI NALING SYSTEM.

J. A. HULIT.

SELECTIVE SIGNALING SYSTEM;

APPLICATION HLED'MAR. l5. l9l2.

Patented Apr. 3, 1917.

zsuczrs-smtsr 3.

l. HUUT.

suscnv: slemms SYSTEM. 1 APPLICATION FILED Ill. IL 1912.

Patented Apr. 3, 1917.

l. A. HULIT.

SELECTIVE SlGNALING SYSTEM APPLICATION FILED MAR. 15. m2

Patented A111. 3, 1917 'ISHEETS-SHEET 5.

1/10711/55559 a Min/70R 1 My $012 n? 15154 131 I V fiTTOR/VEYS J. A. H ULIT.

SELECTIVE SIGNALING SYSTEM. APPLICATION FILED MAR, Hi. I912.

Patented Ap r. 3,1917.

7 SHEETS-SHEET 6v 55 Ullllli l l Why/59555 imam/70A. My? (821%. [RAM-f azawmv. QSELVZ F/QQ WMA' I. A. HUUT.

SELECTIVE SIGNALING SYSTEM APPLICAHON ruin MAR. 16. 1912 Patented Apr. 3, 1917" ISHEETS-SHEEI'I IIIIIIIIIIIIII WI'IWESSLF'S with 'a low voltage UNITED STATES OFFICE.

JOHN A. HULIT, OF CHICAGO, ILLINGIS, ASSIGNOIR T AUTOMATIC ELECTRIC COMPANY.

I OF CHICAGO, ILLINOIS, A CORPORATION OF ILL ENOIS.

SELECTIVE SIGNALING SYSTEM.

To all whom it may concern:

Be it known that 1, Jon): A. HULIT, a citizen of the United States of America, and resident of (hicago, Cook county, Illinois, have. invented a certain new and useful Improvement in Selective Signaling Systems, of which the following is a specification.

My invention relates to selective signaling systems and apparatus for use in conprovide means to avoid having the battery always connected to one side of the line. and to enable the impulse generator to work and the line instrumeuts'-that, is. the instruments at the statiops along the line---to work with a high voltage.

further feature of ny invention is the provision of means in the signaling appararatus associated with the line wherein any 0' all of the signaling devices may be 1'e.- leased with a single impulse followed by a space.

A further new teatureis the provision of asigualiug instrument of the character described having a plurality of bank eontaets in combination with a. wiper wj ei-ebv the; wiper mav be (iHlIOti into engagement with a plurality of circuits at one time.

A further object-is the provision of means wherebvby a single operation of the dial a connection can be built up at one of the stations and a short rlng automatically given.

baclt arrangement whereby the operator is advised-of the fact that the signal at the station being called being operated.

"Fl'HSO and many other features and objects o'f-n y inveution will. be more particw Specification of Letters Patent.

Application filed March 16, 1912. Serial No. 684,114.

Pa tented Apr. 3, 1917.

\A larly pointed out ll the following description in which 1 have illustrated on'e lwarticular embodiment of my invention.

In the aceompam'ing drawings Figural is a plan view of a substation selector.

Fig. 2 is an elevation of the same with the side plate 3 remove-fl. i

Fig. 3 is a front view of the main office calling device.

Fig. -l-. is a front view of thecalling device with the dial and finger levd removed.

Fig. 5 is a rear view of the dalling device.

Fig. (3 is a similar view with the plate 41 removed. i

Fig. T is a sectional view of the same on line. T in Fig. (3.

Figs. s and 9 repiesent the circuit connections of the calling device.

Figs. 10 and 11 are detail views of parts of the calling'deviee.

Fig. 12 represents a. line circuit compris-. ing one central station. :tndftwo substations. Fig. 13 represents a. line circuit in which the substations are provided with semaphores. i

The mechanism of the substation selector shown in F 1 aid 2 islniounted between two mounting plates 2- and 3 which are secured to the base block 4 and the spacing posts 5 and 6. .Tom naled between the plates 2 and 3:5 there is a s1 unit 7 carrying a ratchet wheel 8 rigidly secured thereto. The shaft T is maintained in is normal position with the pin 9 in the wheel 8 resting against the stationary stop post 10 by means of a. small spiral spring 11. on?v end of which spring is secured to the shaft 7 and the other end to the pin 12. The iatchet wheel 8 maybe rotated forward by means of anelectlomag net 13 through the mediumofitspivoted armature 14 and the pawl 15, which latter is seemed to the upper end of said armature.

1 or.1naintaining the ratchet wheel in any spring 11 there is r holding pawl 16 which is rigidly secured to the shaft 17,"whi ch shaft is pivoted between the side plates 2 and This pawl is held in engagement:

with the ratchet wheelby the preponder- 1 mice of weight of its rear end. throw-off provided forth 3' holdingpnwl 16, said throw-oft comprisinga balance" wheel 18 which. is secured to ashaft pivoted between the side. -plates.. Nea itth'erimf of the wheel-1 "18 there is a weight. 19 which tends to rotate the wheel in a counter-clockwise direction, as shown in Fi 2. Secured to the shaft 17 with the paw 16 there IS a lever 20 which-pro'ects into the path of a pin21 in the side the wheel 18. In'the same side of thewheel 18, a proximately diametrically opposite the pin 1, there is a second pin 22. Pivoted between the plates 2 and 3, behind the armature 14, there is a shaft 23 to which 1s helical spring 27 tends to turn the shaft 23 to tip the arm 24 downward, but is normally restrainedby the engagement of the arm 25 I with the-lu 26. ;When the magnet 13 en ergized,.tlie armature 14 .is drawn forward,

the pawl 15 rotates the wheel 8 forward one p -deh arm 24 is tipped dow by the sprin 27. When the arm 24 is tipped downwar it strikes the in 22 to rotate the wheel 18 in a clockwise direction to cause the pin 21 to rise and allow the holding pawl 16 to rise into en agement with the teeth of the 'wheel 8 to hold it in its advanced position. When the magnet 13 is deiinergized, the or mature 14 drops back and raises the arm 24, whereupon thethrow-ofi' 18 begins to restore to, normal position. If 'the magnet 13 remains deiine'rgiz'ed for a suflicient length of time, the wheel 18 restores far enough 'for 4 the pin 21 to strike the lever 20 to withdraw ss the pawl and permit the wheel 8 to restore to its normal osition. The Wheel 18, however, is only s lghtly overbalanced and therefore rotateslbackward slowly, so that if the magnet 13 is energized again quickly it may arrest thereturn of the throw-oil 18 beforc, it has released the wheel 8, and said wheel.

will be advanced a second step and retained in this position. It is thus evident that the wheel 8 may be advanced continuously step by step if the deenergizations of the magnet between steps, are of short duration only, but if a deenergization of a longer duration fensues the wheel will be released. In the side of the wheel 18 there is a pin 28"and in l the side of the wheel 8 thereare a number of pins 29. The paths of rotation of the pins 28'and 29'intersect. The pms 29 are so arranged that when the wheel 8 has been advanced a certain number of teeth, one of 5? said pins 29. will be advanced into the path of-the pin 28. When a pin 29 is thus in the path of the pin '28 it -arrests the return movement io'ft'he throw-off 18 and will prevent the throw-pfl of thepawl 16 when the magnet 13 is deenergized for a long period.

--Thei"'e area lurality ofthe pins 29 in the wheel 8, so at the magnet 13 may be deenergized for a long eriod at different points in the rotation o the wheel 8 with- B5 outmeleasing' said wheel. Secured to the inholds.

side of the plate 3, but insulated thcreirom,

there are two pairs of electrical contacts 31 and 32 which are adapted to be contacted by an arm 30 on the shaft 7 after the wheel 8 has been rotated a certain number of steps. From the foregoing it is evident that the wheel 8 may be rotated to bring the long as desired without causing the wheel 8 to be released. In a similar manner the magnet 13 may be denergized any length of time while either of the next two pins 29 is in the path of the pin 28. The last two pins 29 are'positioned so that when they are in the path of the pin 28 the arm 30 is in engagement with the springs 32 and 31, respectively. It is thus evident that the position of the first three of'the pins 29 determines the grouping 'of the impulscs by which the selector may be operated. Thus if a plurality of the selectors are operated in multiple and the positions of'the first three pins 29 are, not) the same in any two of them, and if pauses occur in the impulses every time one of the ins 29 in some particular selector comes ADtO the path of the pin 28, it will be seen that the wheel 8 of this selector will be continuously progressed,

vwhile the wheels 8 in all the others will be released at least once and will not, therefore, be fully operated if the total number of impulses sent are only suflicient to operate the selector which has not been released.v

Referring now to Figs. 3 to 8, inclusive, the construction of thecalling device is as follows: Journaled in two plates 40 and 41 (Fig. 7), which are held apart by suitable posts, there is a shaft 45 to the end of which,

in front of a cover plate 99, there is secured a dial 42 provided with aplurality of finger Secured to'this shaft there .are a plurality of toothed cam 'wheols .43, two of which areshown in face. view in Figs. 10 and 11. Above the wheels 43 there are a corresponding number of normally closed end of the long-spring of each pair there is a small lateral projection which projects into the path of the teeth of the wheel 43. sothatzwhencver the teeth on any one of the Wheels come directly under its" pairs of springs, said springs are separatcdi As shown herein, the teeth on the different wheels 43 are so. arranged that in each rotary position of the shaiit, corresponding to the finger holds of the dial 42, threcpairs of springs are opened, a different combination pairs of contact springs 4.4. Upon the lower "a lock spring 46 of pairs being operated in each position. Around the rear end'of the shaft 45. there is for the purpose of returning said shaft to normal position after it has been rotated forward through the medium of the dial 452. The speed of rotation of the shaft 45 is controlled by a small governor 47 which is connected with the said shaft through the medium of the gear wheels 48, 4t) and 50. pin 51 in the plate 41 serves as a norn'ial stop for the shaft 45 by being engaged hy the pin in the gear wheel 49.

,Journaled in the plates 41 and it) there is also a' shaft 58 to the rear end of which there is secured a disk of insulation tll to the face of which there is secured a metallic plate (12, upon which latter there is mounted a wiper or hrush 59 (Fig. 5) which is adapted to rotate over and make contact with a plurality of insulated contact. points no. The power for rotating the shaft 58 is sup plied hy clock spring 62" shaft 63. The power is transmitted from the shaft (33 to the. shaft 58 through themediniii of the. gears il and (35. The gear wheel- 64- is not rigidly secured tothe shaft 63, but is loosely mounted thereon and con nected therewith through-the medium of a spring '77 by )t'lWl 151 and ratchet 150 so as to rotate with the shaft in one direction only. The speed of rotation of the. shaft 58 is controlled by the governor Go through the me dium of the gears 67. 68, G0, and 7i. Se cured to the shaft 63, in front of the plate 40, there is a gear wheel 72 which meshes with a 'gear wheel 73 which is loosely mounted upon the shaft 45. Secured to the gear wheel 7Sthere is an arm 74 which extends up through an opening in the'eover plate 99 and radially out hehind the dial, and is then henthack over its face. the end extending inward beyond the inner row of finger holds. The stop for stopping the shaft in normal position comprises a lever 75 on the shaft (13, which lever engaged h a pin 76 in the wheel 71. Secured-to the shaft 45 just backof the front platc-alfi-there isa ratchet. wheel 53 which is-ndaptotl to he engaged 'by a ratchet 54," which latter, however, is norrnjally' he'ld out of engagement With the ratchet wheel 53 against the tension of a wl'icel 73. The downward movement. of the lever 74- is limited hy a stop 7 9 on the plate 99 (Fig. 3).

The. mode of operation of the;ealling de- "'vic e' is as followsz-Each of thefinger holds of 'thedial'42 is numhered or otherwise des- 60' igna'tedpin accordance. with the designation of the substations to. be called by it. In order to call any substation a finger is'-insorted in a. finger hold of the -dial and the dial is rotated until the. finger strikes the lever 74 and forresit down against the stop (Fig. 4) on the a pin 78 in the-hack of the 81 and 82.

1 and 2 longer than the spare hetweeifi the 125 rema ning co'itaets.

speetive. pairs. of the Sl-H'lllgsdd, the con;

79. Upon the in tial movement of the lever 74 the ratchet 34 is released and drops down into the teeth of the ratchet wheel 53.

As the lever 74 continues to be pulled down it winds up the spring .02 and rotates the 7 lever 75 (Fig. (3) out of the path of'the pin 76. The wheel (54, aml consequently the 'shaft 58, do not rotate during this forward movement of the lever 'Tlbecause of the ratchet conneetitn between the shaft (13 and 75 the wheel 64. Tue pitch of the worm of the governor (l6 and the wheel (37 is such as to prevent a backward rotation of the governor by said Wheel, wiich serves as a positive lock it to prevent the shaft 58 from heing rotated backward. After the finger leverfit has come into contact with the. stop 79, the linger is removed from the linger hold, whereupon the lever T l lugins to he restored to its" normal positioi by the spring (32", while the dial remains held in its advanced 'posi' tion h v thei'aehet 54-. As the lever 7-ireturns to normal position. the shaft fii is rotated also to uuse the wiper Til to rotat over the contacts lltL 'lhe ratio of the gear wheels is o chosen that while the lever Tl is returning l I'IllLll'S operated position to its normal posiion the shall 53 will malie one complete r-volution. 'l'herefore. when." said shaft rompletes its revolution. the pin TU linds the l-ver. 75 again in its path, \vherehv hoth he shaft Ti? and the finger lever 74- are hrought to rest in normal position. Just hetore the linger lever rearhes its normal position, however, the pin 78 forces the ratchet :il out of the teeth of the wheel 5?; and allows the dial to he restored to its normal osition lrv-the spring -lt ll will thus he. stem that whenever the calling 7 device is operated, the wiperot) makes one con'iplete rtwolution oven the contacts (it). while the. dial remains in some advanced position, corresp nding to the linger hold used on the dial. .\s has heen explained, when the dial is rotated itcauses the cam wheels 43 to separate three. different pairs of the springs 44 in each of its stop positions.

. The electrical ronne r-tionsof :thc calling device shown lll Fig. 9 are as.follows': The

wiper 5!) is (a nneeted throughjlhc inedi'l lln 1.]. 5

of a lirush 90 with an intermediatepointyof the halterv ll. There are. twenty four of the contacts i l'and the wiper 59 no'rmally rests-upon the last one. The impulses are. transmitted from the calling device. t'o -tl1e. line. through lllt medium of two rela v's'fil and 82. The li'rst three of the contacts (ill are permanently connected with the relays,

The rontacts -land .5 are connected with the i' 'ela vstln'oi|gh.. .,re-

tact. (i is pernunently connected with the rc f lays, while the remai-ning contaets'i up'- to i i fi r h Pena-2 contacts 17 and 18 are nomially. open spring 88 o rated key and including the contact 16 are connected with the relays through the springs 44. The

Y ermanently connected with the relays. he contact 19 is open. The contacts 20 and 21 are connected together and are also connected with the K. The contact 22 is open, he contact 23 is connected to a normally closed spring 84 of a key K, and the contact ,24 is connected to a normally open spring 85 of the other side of the same-key.

The relays 81 and 82 are adapted, when energized", to bridge the battery B between the two line conductors 86 and 87. Besides :the keys K and K there is also shown associated with the calling-device an impulse sending device ;S which may be operated to transmit a certain number of impulses, in this case two, through the relays 81'and 82 each time it is operated. This device may be a call box, such as is used in wellknown district telegraph systems, and is diagrannaatically represented herein by an impulse ;heel which is adapted to contact ing'of an induction coil 93 to the arm 30.

The bells 91 and 92v may be of the ordinary vibrating, type. -Thc secondary winding of theiijduction (fOll is bridged across the'line conductors 88 and 89. Each substation is falso provided, with a telephone instrument whit-h is bridged across the line. At the (main or central station A the lineconductors '88 and'89 terminate in contacts of a twopolo switch 5, by mcansof which a calling device similar to that described hereinmay be connectedto the line.

the "Tielays 81' and 82 are shown. The manner in which said relays are controlledcis fully-shown in Fig. 8. The main station A "also rovided with a telephone. By means oY the switch S the calling device may be connected with any one of a number of different lines.

The complete operations by .means of I whi h the operator at the station A may sig of a manually In Fig. 12 only inal' one of the substations A or A are as iollows: It will be assumed that it'is desired v call the substation A and that said subl Etationis provided with a selector in which he ins 29 are placed .as' shown in-Fig. 2.

; spaced that the code number of this station, as represented by the grou ing of the impulses is a-e-a-s (i In or theoperator must first operate the switch S tov connect the calling device with: the line upon which the substation A is situated, then place a finger in the finger hold allotted to that substation and o erate the dial as heretofore explained. T e cam wheels 43 must be so arranged that when the dial is operated through the medium of this finger hold it will se arate the second,- fifth and ninth airs of t e sprin 4e, counting from the 1e inFig. '8, w ere y the contact points 5, 9 and 13 in the grou 6O are'disconnecte'd from the relays 81 an 82. When the dial and lever 74 are released, the wiper 59 begins to return to normal position. As the Wiper 59 passes over the contact 1,-the relays 81 and 82 are energized and cause one impulse of current to flow out over the line, whereby all the selectors are advanced one step. This first im ulse is followed by a lon pause, while t e wiper is passing over tie long space between the contacts land 2. This pause causes all'the selectors to be immeiately released and their wheels 8 to be returned to, normal position. This preliminary impulse is, thereore, for, the purpose of insuring that all the selectors shall be in normal position before the selecting impulses begin to be sent in. As the wiper 59 passes over the remaining contacts 2 to 18, a total of fourteen impulses are transmitted to the selectors, which impulses are divided into four groups of three, three, three and five impulses, respectively, the groups being separated by pauses caused by the wiper passing over the contacts 5, 9 and 14, which contacts are disconnected from the relays 81 and 82 b the operation of the dial, as exlained a ove. During these pauses the se- .ector at the susbtation A is prevented from being released by the cooperation ot the pins 28 and 29, while the selectors at each of the other substations will be released by at least one of these auses. The wheel. 8 at the substation A is advanced the full fourteen steps, whereby the arm30 is brought into contact with the s. ring 31, and the next to the last pin 29 is rought into the path of the pin 28. The wheel 8, therefore, remains in thisposition until the wiper 59 passes over the contact 23, whereby one more impulse-is transmitted through the selector, causing the wheel-,8 to be advanced one more-step to rethe circuit of the bell includes one winding or to call the station A move the pin 29 from the path of the pin 28,

r is

of the induction coil 93, the other winding of which is bridged across the line, the interruption of current in the. bell circuit pro duces a buzz in the line circuit so as to signify to the operator at the main station A that thebell at the called substation is ringin As has been explained, there are two be Is 91 and 92 at'each substation. The bell 92 might be used to signal a second operator at the same substation, or it might be used as an emergency bell. In order to cause the bell 92 to be rung, the attendant at the main oilice A, before operating the calling device, throws the lever of the key K to the right so as toclose the contact between the springs 83 and 94:, whereby the contacts 20 and 21 are connected with the relays 81 and 82. In

this case two impulses are transl'nitted over the line as the wiper 59 passes over the contacts 20 and 21, whereby the arm of the selector is carried past the contact 31 and into engagement with the contact 32, whereby the circuit of the bell 92 is closed. It will .be seen that the circuit of the hell 9). also inbell 92 rings continuously. The selector may be released in this case by throwing the key K to the' left momentarily. whereby an impulse is transmitted through the relays 81 and 82 by way' of the brush 80, wiper 59. contact- 24 and the springs 96.

If, before'a all is made. the lever of the key K is thrown to the right to separate the spring 84 from the spring 95. the key K re maining normal, no impulse will be sent out over the line when the Wiper 59 passes over the contact 23, and the selector at the .called substation will not be released, 'la|tits bell 91 will ring continuously. In orderto release the selector in this case, the key K is thrown to 'the'left' momentarily after the ad Mar 59 has come to rest upon the contact 24, whereby the relays 81 and 82- are energized "momentarily;

It is evident from the above description that the position ofthe'first three pins 29 in the wheel'8 of the selectors determines their code numbers, or the manner in which the impulses -mnst be grouped to operate 'For instance, it willflbe seen that by clian'gingthe positions of one or more of these pins inthe selector shown, it may be made to respond to the numbers 3-3 -4y-4, 33--5--3, etc. Although each -selector is adapted to respond to impulses whiclrare separated into. groups in a certain way, it

will also respond to fourteen impulses in one individual group, so that all stations may be signaled simultaneously as well as selectively. Some certain number on the dial of the calling device may be' reserved for calling all the stations simultaneously, and the Wheels 43 are so arranged that when this number is called the impulses will not be broken into small groups.

By duplicatir g the contacts 31 and 32, as shown at 31 and 32 in the substation A the bells 91 and 92 may be rung alternately. or any number of contacts may be employed and each contac; may be connected to a separate hell if desired. The impulses for stepping the wiper 30 from one contact to the next may be prr ducedbythe device S (Fig. 8), said -device being arranged to produce the exact number of impulses necessary to Inovethe wiper from one contact to the next. 8'5 The ratchet wheel 8 of the selector may be provided with as many additional pins 29 as there are additional contact points. so that the wiper may be held on any contact as long as desired. The code numbers of all 99 thestations may be so chosen that the impulses for step 'ing the wiper at one station from one conta3t to another will not cause the wiperat any of the other stations to be moved into engagement with its contacts.

When there is a plurality of contacts on the selector they should preferably be at least two steps apart, so that the selector maybe released from my position by a single'impulse. a l

The electrical connections shown in Fig. 9 are the same as those shown .in Fig. 8 with the exception that in Fig.4) all the contacts 2 to 18, inclusive. are connected with the line relay-s through the springs 4+,whilein Fig. 8 some of the contacts a re connected to the relays direct. The arrangement shown in Fig. 9 is tln-Lmore general arrangement. since it permits of a greater number of codes 0 to be called. I often found that allthc combinations d sired may be. obtained without ever opening certain pairs (lithe-springs 4+, in which case these springs and their corresponding wheels 43 may "lw omitted' from the calling device and the corresponding contacts (ll connected to the relays S1 and H2 direct. as shown in Fig. 8. 1

As shown herein, it will be seen .t'liat'lhe battery ll is norn'lally entirely disconnected from the. line circuit, andwhen an iinpulse' is sent out, the two terminals of the batter)" are connected with the opposite sides of the line simultaneously. ;This is found to be much more satisfactory than the usnalfa'i rangcinent, wh re. one terminal of the hattel-y is pcrmaluntly connected with ouofsidc' of the line and the impulses are p|"(nllu-cd"hy. opening and closing the. connm-tion betwcci' the other side of the line and the otln-r'side'" setthe signal himself in case it is impossible for. any reason to obtain a response from the way"stat1on operator.: 'lhe semaphore may be of any suitable. type which may be controlledelectrically from a distance'and is; .herem represented as being )lOVldQLl with a motor 100, which is include in a normally closed circuit to hold the semaphore in its safe position. At D there is shown an answer back device in the form of a sender, such as is generally used iudistrict telegraph systems. This answer back, device back to the sending operator a dis tinctive si al to inform linn that the semaphor'e at t e station desired hasv been operatedq 'lll e operation of the system as shown in dais as follows. The answer back device D' is held in its set position by 'themagnet .101. J {When the selector arm 102s operatedtd make contact with the sec-' and contact :point 103 thev magnet 101 releases the answer back device, whereupon the wheel 1101 makes"- one complete revolution.

while the arm' 105*.- rises. and separates the springs 105 in the motor circuit, whereby the semaphore is permitted to be rotated. by gravityto the danger position. As the wheel 104 inakes its revolution a series of impulses are. transmitted-from ground G through the wheel 104,brush 106, thence through the two coils of the selector magnet 107 and the two I (Iihe' conductors 1 08 109 in. multiple.

through an impedancecoil 110, relay 111 and batter B. to ground G. The relay 111 con-f. 'trols t H elocalcircuit of a printing telegraph instrument which will. record on a tape the si na-l returned by theanswer back device I);

w ereby the despat cher is informed-that the proper semaphore' has been. operated. It will be noted that the impulses for; operating the selectors are transmitted over the twosides of the line in series, while the impulses returned to the central oilice by the answer back deviceD are transmitted 0"8l the two sidesof the line in parallel, so that thedes vices intended to-bepper'ated by one kind of im ulses are not affected by the other kind.

i ihile'I-have illustrat certain embodiments of my invention, it. is to be understood that I do not wish to be limited to those actually shown, as many than as and modifications will readily suggest t emselve's and will come within the scope of my invention.

, What I claim as my inventio is 1. In a code impulse sending device, a y

single dial, means for sending different codes of mpulses by difl'erent operations of said dial, each operation transmitting a. plurality of groups of impulses, said means including a code setting device automatically set by the operation of said dial.

2. In combination, a lineand an impulse sending device, means for sending codes of impulses over said line, each -code consisting of a plurality of groups of impulses means for selectivel Y varying the codes, said including ,adial, the variations of the codes obtained through the medium of the 'dial.

3. In a signaling system, an impulse generator adapted to generate impulses, an impulse spacer which splits up the impulses generated at each operation of the generator means I into groups, and a separate circuit for each impulse generated.

*1. In a signalmg system, a calling device,

an impulscgencrator having a separate circu|t 'for each impulse generated, impulsecontrolling apparatus associated with each c'1rc1nt..and-a dlal for operating the circuitcontrolling apparatus.

5. In a signaling system. a calling device an impulse transmitter having a separate circuit for eachimpulse generated, an impulse-controlling apparatus associated with each circuit. and a dial for operating the circuit-controlling apparatus.

6. In a signaling system, a calling device, an impulse transmitter having a separate circuit for eachimpulse generated, an impulse-controlling apparatus associated with each circuit, a dial for operating the c'irc uitcontrolling"- a )paratus'. and means for controlling the rial tcgether with' the impulse generator.

.l. In a signaling system, a calling device,

an impulse transmitter having a separate.

circuit for each. impulse generated, an impulse-controlhug apparatus associated with each circuit, and a dial for operating the circult-controlling apparatus, said dial being provided with. and-controlled together with theim'pulse generator through the medium of suitable finger holds. I

8. In a'signaling systenna line. signaling apparatus associated with the, line, a buttery, means including a line rclayfor operating the signaling apparatus associated with the hue, an impulse generator for oper-.

ating the line relays, a source of electric energy for operating the -l.ine relays. and a source of electric energy for operating the signaling apparatus, the latter source being of hi her volta e than the former.

9. n a signa mg system, a line, a signaling-deyice for the Inc, an impulse generator for-the line for operating said signaling device, said impulse generator comprising an automatic im ulse producer and a. manual vice beingequippcd with releasing means impulse pro -ucer,. the said signaling de--- Y transmitter to transmit a plurality of series '5 17. In a-signalingsystci'n,means fortrans- 0f impulses.

' 11. In a. signaling system. an impulse transmitter including an impulse generator tor generating aseries of impulses, means for dividin" said Stl'lt's of impulses into a.

plurality of groups. and a dial for controlling the operation of said transmitter. 12. In a signaling system. means for transmitting-a plurality of series of impulses, means for spacing apart the dil'l'erent series of impulses, aml a dial for controlling by a single operation said transmitting and spacing means.

133. In a signaling system. an impulse tans'mittcr inclluling a series of contacts. a contact maker adapted to be rotated over i said contacts, means torti.-\iisinittii1; an impulse when said contact maker comes in contact \ritlrcach contact. and an impulse p'acer for preventing impulsesheint transwinilted when said contact maker comes in (.Kcontact with certain of said contacts to di- S S-ride,thtfimpulshs into three groups. .each

. L"l'()lll) consisting of a series ot'imp'ulses.

1+. In, a. signaling system. 'an impulse transmitter including a series .01 contacts. a contact inaker adapted to he rotated over said contacts. means for transmitting an impulse when said contact maker comes in contact with each contact. an impulse '.-])2lttl for preyentintz' impulses liei-ii; transmitted when said contact maker comes in contact 4;; with certain oli said contacts. and a dial for controlling; the operation -o,l"said transmitter. 15. In a signaling system. an impulse transmitter including a series of normally closed contacts. automatic means for open ingcertaincfjsaid contacts, and means for transi'i'litting three series of impulses. the Jlllllllltl' of. impulses in each series being dependcnt upon the particular contacts which are. opened.

it). In a signaling system. animpulse transmitter including a series oi normally closed contacts a dial 'l'or opening certain coml iim tions 'ot' said contacls. depending upon the extent of operation of said dial. and means |'or transmitting a plurality of series oli iinplilses. the number of impulses in each series licin r dependent. upon the particillar contacts which are opened.

mitting a plural ty of series of impulses, said means including a series of local cir cuits normally closed at one point and normally opened at a second point, an impulse spacer for opening three of said normally closed points, and a contact maker adapted to successively close said normally open points and to p1 oduce three series of impulses.

18. In a signding system, means for transmitting a 'plurality of series of impulses, said means including a series of local circuits normally closed at one point and normally opened at a second point, an 'impulse spacer for openin certain of said normally closed points, a contact maker adapted to successively close said normally open points, and a rotary dial having-finger holes for controlling the operation-of said means. i

19. In 'a signaling system. an impulse transmitter comprising. a series of normally closed contacts, a contact maker. a series of contact points 0H1 which said contact maker is adapted to rotate, a rotary dial adapted upon its toru'arc rotation to separate cer tain of said normally closed contacts. depending upon the extent of rotation of said dial. an arm controlled by the rotation of said dial. and means controlled by said arm for rotating saii' contact maker over said contact points, \v iereby a plurality of series of eodeimpulses are generated.

20. In a signaing system. a linecircuit, a. battery normally discoi'ine'cted from said line. a relay-.coi trolling said h'attery connection. and meals for transmitting a series of impulses through said relay to thereby impressai series of code impulses on said line. said means including an impulse. transmitter. a dial f0. controlling the operation of said transmitter. and means whereby a single operation of said dial operates said transmitter to transmit a plurality of series of impulseS- 21. In .a signaling system. a line circuit. a battery normally disconnected from said line. a relay controlling said battery con-' nection. and means for trans'initting'a senes of lIl'lPlllStS. through said relayto thereby impress a series of code mpulseson said line. said means 'ncluding animpulsc transmitterincluding' an impulse generator for generating a; series of impulses, means for dividing said'series of impulses into a pln-. rality of groups. and a dial for controlling the operation of said transmitter.-

22. In a signaling system. a .line circuit. a battery normally disconnected from said line. a relay controlling said battery connection, and means for transmitting a series ofimpulses through said relay to thereby illilll'OSS a series of code impulses on said line. said means including meansfor transmitting a plurality of series of impulses.

means for spacing apart the different series of impulses, and a dial for controllin by a single operation said transmitting an spec-- ing means. Y 23-. In a signaling system, a line circuit,

a battery normally disconnected from said' line, a relay controlling said battery connection, and means for transmitting a series of impulses through said relay to thereby impress a series of code impulses on said line, said means including an impulse transmitter includin a series of contacts, a contact maker a apted to be rotated over said contacts, means for transmitting an impulse when said contact maker comes in contact with each contact, and an impulse spacer for preventing impulses being transmitted when said contact maker comes in contact with certain of said contacts. I 24. In a signaling system, a line circuit, a battery normally disconnected from said I line, relay controlling saidbattery connection, and means for transmitting a series of impulses through said relay to thereby impress a series of code impulses on said line, said means including an impulse transmitter including a series of contacts, a contact, maker adapted to be rotated over said contacts, means for transmitting an impulse when said contact maker comes in contact with each contact, an impulse spacer for preventing impulses being transmitted when said contact maker comes in contact with certain of said; contacts, and a dial for controlling the operation of said transmitter.

25. In asignaling system, a' line circuit abattery normally disconnected from said line, a relay controlling said'battery connection, and means for trans n ittin' a series of impulses through' said re try to thereby impress a series of code impulseson said line, said means including an imrpulsetransmitter. including'a series of nor- .45 mally closed contacts, automatic means for opening certain of said contacts, and means for transmittin a plurality-of series of imulses, the num r of impulses in each series ing' dependent upon theparticular 'contacts which are 0 ened, a 26. In a signs. ing system, a line circuit, a, battery normally disconnected from said line, a .relaycontrolling said battery con-' nection, and means vfor transmitting a'series ,of impulses through said-relay to thereby impress a series of code impulses on said line, said means including an. impulse transmitter' including a series of normally closed contacts, a dial for opening certain combinations of said contacts, depending upon the extent ofoperation of said -dial,and means fontransmittin a plurality of series ofimpulses, the'num er of impulses in eaeh seriesgbeing dependent upon the particular contacts'which .are'opened;

said means including means for transmitting a plurality of series of impulses, said lastmentioned means including a series'of local circuits normally closed at one point and normally opened at a second point, animpulse' spacer for opening certain of said normally closed points, and a contact maker adapted to successively close said normally open points.

28. In a signaling system, a line circuit,

-a'battery normally disconnected from said line, a relay controlling said battery connection, and'means for'transmitting a series of impulses through said relay to thereby i'm-' press a series of code impulses on said line,

said means including means for transmitting a plurality of series of impulses, said'lastmentioned means'including a series of local circuits normally closed, at one point and normally opened at asecond point, an im-- pulse spacer for opening certain of said nor-' mally closed'poin'ts, a contact maker adapted to successively close said normally open points, and a rotary dial having finger holes for controlling the operation of said means.

29. In a signaling system, a line circuit, a battery normally disconnected from said line, a relay controlling said battery connection, and means-for transmitting a series of impulses through said rela to thereb impress a'series of code impu seson sa'i line,

said means including an'impulse transmitter comprising a. series of normally closed contacts, afeonta'ct maker, a seriesof contact points over which said contact maker is adapted to rotate, a' rotary dial adapted upon its forward rotationto separate certain of-said normally closed contacts, depending upon he extent of rotation of said dial, an arm ,co olle'd by the rotation of said dial, and, means controlled by said arm .for rotating said contact maker over said contact oints, whereby a plurality of series of code 1 lmpulses are nerated. 30. A qode Impulse sending device having means for sending groupsof impulses, selectlve means for vary ng of said means controlled by a single'dial,

31, In a signaling system, a line circuit, an" impulse sending device, a rotary dial having single impulse,- followedby a prolonged use, and then a series ofgroups of code impulses over said lme, and selective. means the. impulse groups at will, all of the selective operations for varying said groups'of impulses at will.

Y 32.-In a signaling system, a line circuit,

V 1,221,so1

means for transmitting a single impulse, followed by a prolonged pause, and then a series of groups of code impulses over said line, a rotary dial having finger holes for controlling said means by a single operation, and select ve means for varying said groups of impulses at will.

33. In a si aling system, a line circuit, a, plurality 0 stations on said line, a signal and a selective device at each station, an impulse transmitter, a dial for operating the same, means whereby a single operation of said dial the signal at any one of said stations can'be selected and operated for a short period, and means in said impulse trans 15 mitter for enabling said selected signal to be operated continuously.

Signed by me at Chicago, Cook county,

Illinois, this 1st day ofMarch, 1912.

J OHN A. I-IULIT.

\Vitnesses ARTHUR T. RAY, ALBERT ILNDERSEN. 

